If you're looking for high-quality Peterbilt parts for your semi truck, you'll find all the best aftermarket, custom, and chrome parts and accessories at 4 State Trucks. No matter which Peterbilt parts you are looking for, we have them in top quality aftermarket options. Replacement parts for Peterbilt 379, Peterbilt 389, Peterbilt 579 and most other models are in stock and our large selection of parts offers great options so you can customize your big rig. Our online inventory features a variety of different aftermarket parts and chrome accessories, including bumpers, fenders, hoods, and more. We've got everything you need to amp up the performance of your semi truck and keep you moving on the road. Shop with 4 State Trucks to get the perfect Peterbilt parts for you and your 18 wheeler.